1 / 7
Télécharger la présentation

ROUNDWORMS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ROUNDWORMS Kingdom Animalia - Phylum Nematoda --Unsegmented worms--Pseudocoelom ("false coelom")-- body cavity contains organs

  2. Digestive tract with 2 openings:mouth & anus Feeding Free-living - predatorsParasites - humans and animals Reproduction: Sexual reproduction, Separate sexes (male & female)

  3. Roundworms & Disease Trichinosis (trichinella worm) - cysts within the muscles are consumed (undercooked food) -- worm grows in intestine-- forms cysts in the muscles of the new host -- symptom: terrible pain in muscles

  4. Filarial Worms - found in Tropical regions of Asia -- usually transmitted by mosquitoes-- causes elephantiasis

  5. Ascarid Worms (common roundworm) - lives in intestine- eggs are passed out in the feces Most roundworms infect dogs, but occasionally they find their way into human hosts

  6. Hookworms - burrow into the skin from soil- mature in the intestines--hooks used to attach and suck blood

  7. Research on C. elegans • first organism to have DNA completely sequenced • It is a very simple, free living roundworm

More Related